已测试，河南钉钉免流通过测试

河南0375测试钉钉通过，感谢大佬提供代码
listen_port=65080;
worker_proc=0;
daemon=on;
uid=3004;
mode=net;
http_ip=;
http_port=80;
http_del="Host,X-Online-Host";
http_first="http_first=“[M] [U] [V]\r\nHost:ikun.dingtalk.com\r\nHost:[H]\r\n";
https_connect=on;
https_ip=220.181.111.189;
https_port=443;
https_del="User-Agent";
https_first="[M] [H]@ikun.dingtalk.com [V]\r\n";
dns_tcp=http;
dns_listen_port=65053;
dns_url="119.29.29.29";